H - Electricity – 05 – B
Patent
H - Electricity
05
B
356/18, 327/2.5
H05B 6/66 (2006.01) H05K 1/02 (2006.01)
Patent
CA 2012790
Abstract A high voltage power source device comprises an electric power source; a low voltage circuit constituted by an inverter circuit including a semiconductor switching element and a capacitor for converting electric power from the source into high frequency electric power; a magnetron; and a high voltage transformer for converting the high frequency electric power into high voltage and supplying it to the magnetron. A printed circuit board has electric wiring formed thereon for connection to and supporting the inverter circuit and a high voltage circuit for the voltage boosted by the high voltage transformer. The board has separate areas therein, and the low and high voltage circuits are formed respectively on these separate areas. The board includes a patterned grounding conductor formed at the boundary between the separate areas and also has either a plurality of openings extending completely through the board in alignment with the patterned grounding conductor, or a plurality of generally elongated electroconductive pieces each having opposite ends connected to the patterned grounding conductor.
Matsumoto Takahiro
Niwa Takashi
Sakamoto Kazuho
Suenaga Haruo
Kirby Eades Gale Baker
Matsushita Electric Industrial Co. Ltd.
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